Resinous condensation products of acetoacetic esters and unsaturated aldehydes



United States Patent O me 2,755,268

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RESINOUS CONDENSATION PRQDQCTS E 'ACET A ET E TE S' as!) mas r BATED ALDEE E K' 1 Heinz Uelzmann, Ludwigshafen (Rhine), Germany, asproducts signertoiBailiscl e-Anilinrisz' sodaefabrik A'ktiengesell- Hard and brittle resins are obtained by the reaction of sclraft, Ludwlgshafen (Rlnne), "Germany poltyiacyl derivatives containing more than two activated [1516 Drawing. Application May 29, 1952, 5 1 L .q iil wfi r' d i s minus 5: rtmtse i .n-

d f ati ti .Wi' imamsenate jii d fic a ls e a is Claims priority, application Germany Jl e 2, 19.51 employing bifuii ctionai'acyl 'der a'tives'ibecause 7 C] m CL simultaneously a polymer gatlon oi theuns'aturated alde- F tal? ,7 no hydes takes place. By"reacting mixtures of two or more polyacyl derivatives with" aldehydes} still further varia- "trons :inthe properties of the productsmay' be obtained. ZEh'e'new macromolecular substancesmay be employed for many ptlrpos'eselnd may servefor example as Feasting resins for the production of sliaped articles; For-this purpose the mixture of the initial materials or the stillliquid initial condensation-"pi'bilucts are poured into appropriate hollow molds, whereby'shapedarticles of any -shape or size canbe prepared, if'desired'-with the addition of fillers, fibres, pigments, dyestufis and the like.

Since-water 'is setfre by'the reaction according to amms polymercaptans, amindalcoh 01 s and. hydroxy or this invention, it IS advantageousto 'carry'oufthe r'e'a'ction aifii-fidih'rcbrthi 1 Y i" a in the presence of substances which are capable of com- The r a ion bi d a yl de ivatiy sq e y qls whiqhssnil i-Y i Y 3l?T?- t iniactiyated m thylencerqu s nth acy diq lsy ith fl 1 .alt e ysle prq dswith .th sn n 9 Pf a.t ,.29b- P ff i 9 3Y P iahlyac' dinglto the gllo in s eme: Q93 1 QQ QEKQ fQES 45K?- x o X X (l? (I) "aailse e-wa 0 ta l- 9mm". P a I l a. c1 s 18H .s v l. l,

his inyentiq rela e t henmd stiqn 9 992M113??- a qlcslll l'.DlHPQll ld fJ'QH aldeh de andsnbstapsssw ac ate methy en roup vh v .fqun j' a m l rqmo ecular 9QQIJBQERQ$ 9 31 20 p en te -.by ac in w t a11e s9a PR HL 'E c n'mi aplural y Qf act vat d fi e .steursin th molecule. .S u. tab. qqmpqund f kind a e mple ,p lya y der v iye e ived tram arbgs li aslsl act vate th en roup ad'nqly uns .999- niqupsl ap ble L be n acy ated sas as nolyalcqhol as or exampl utan diol n mae t ritplrprpnqlyamples. The partsarefby\ii'efght. a

wherein X represents a iY lfii lg 8 7933125, as {one ple The following examples will further illustrate this incarbonyl; cN r cqolt grqu -31 rep dive'rition bilt'tlie invention 'is notrestricted"'to'theseexvale a seni v.radisals havi 2993123 ha lwm as for example (CH2)4- 01' -(CH2)2-S(CH2)2- radicals and R2 represents hydrogen or a monovalent organic di L 290 parts of b1 s-acetoacet1c ac1d thiodlethyleneglycol Suitable acyl derivatives with strongly activated methyll f mlxed Wlth 70 P i fifotonaldehyde t an ene groups are preferably the radicals of p-keto or addition of 2.5 parts of pipendme. The condensation a-cyano carboxylic acids, such as the derivatives of lakes Place at room temperature' and Complete after acetoacetic acid, propionylacetic acid, butyroacetic acid about 2 f A11 elastlc, s 'f wh t sticky resin is oband cyanoacetic i tamed which canbe rolled easily. Its sticltiness entirely A great variety f aldehydes may b used f the disappears when it 1s sub ected to a tempering process at process, but preferably c p-unsaturated aldehydes such as about to for Several hours- Example 1 crotonaldehyde, acrolein, a-methylacrolein and cinnamal- If 56 Parts of acroleill be P Y illstead 0f the 'dehyde and also aliphatic, mixed aliphatic ammafic and crotonaldehyde, a product is obtained which is less elastic. heterocyclic aldehydes. The molecular ratio of aldewhen h Polycondensatlon 1s earned out 111 molds, If

hyde to polyacyl derivatives with active methylene groups (lesired with all ti n 0f fillers, fibres, pigments and the can be varied within wide limits but it is preferable to 60 hke, Shaped artlcles are Obtained Wlthout mechamcal employ 1 mol of a monoaldehyde to 2 activated methyleratlonsene groups. It is probable that the aldehyde first reacts Example 2 with activated methylene groups with the splitting olf of water while maintaining the said molecular ratio, whereby 358 parts of butanetriol-(1.2.4)-triacetoacetic acid ester activated double linkages are formed which then further (prepared by interchange of ester radicals between acetoreact with remaining free activated methylene groups acetic ester and butanetriol-(1.2.4) at 130 C. to 200 C.)

according to the principle of Claisen-Michael. and parts of crotonaldehyde are mixed and a small The reaction may if necessary be carried out in the amount of piperidine is added. The mass becomes hot presence of the known basic reacting catalysts for the and after about 30 to 40 minutes a pale yellow resin aldol condensation, as for example small amounts of 70 similar to colophony is obtained which becomes hard after alkalies or amines. Hydrogen chloride can also be used about 3 hours. It is practically insoluble in most of the usual solvents. It dissolves in dimethylformamide at the boiling point.

When the condensation is carried out with larger amounts of crotonaldehyde, more soluble products are obtained. Thu for example 358 parts of butanetrioltriacetoacetic ester and 140 parts of crotonaldehyde give a resin which does not become solid until after 24 hours and is soluble in acetone at the boiling point. By employing 210 parts of crotonaldehyde, a viscous oil is formed which dissolves well in acetone and is still soft after 3 days.

Example 3 258 parts of butanediol-(l.3)-bisacetoacetie acid ester and 72 parts of butyraldehyde are mixed and about 1.5 parts of piperidine added. A viscous, sticky resin is obtained which may be spread out into films which harden after several days.

Example 4 250 parts of the diamide from 1 mol of hexamethylenediamine and 2 mols of cyanoacetic acid or cyanoacetic ester are fused by heating and 132 parts of cinnamaldehyde are slowly introduced into the melt. After cooling, a hard, brittle resin is obtained.

Example 5 256 parts of thiodiethyleneglycol-bis-cyanoacetic acid ester are reacted with 70 parts of crotonaldehyde with an addition of 1.2 parts of piperidine. A tough, pale brown resin is obtained. 96 parts of furfurol may also be used instead of the crotonaldehyde.

Example 6 358 parts of butanetriol-triacetoacetic acid ester are mixed in a ball mill with 425 parts of calcined gypsum, if desired with the addition of a dyestuff. The mixture is then cooled to about 5 C., 7 parts of piperidine are stirred in and then, after the addition of 98 parts of crotonaldehyde, the mixture is again stirred thoroughly. It is then poured into molds, preferably before its temperature has risen above 10 C. to C. After some hours, articles are obtained which, if the molds employed are smooth, have a high surface gloss and which may be afterhardened by tempering at 50 C. or by storage for several days at room temperature.

The polycondensation may also be carried out in a large fiat mold and one side of a wood fibre plate dipped in the reaction solution. There is thus obtained a lustrous, solid coating on the wood fibre plate.

Example 7 590 parts of butanetriol-triacetoacetic acid ester are mixed in a ball mill with 740 parts of cement and worked up into shaped articles as described in Example 6 after the addition of 10 parts of piperidine and parts of crotonaldehyde.

What I claim is:

1. A process for the production of macromolecular compounds which comprises reacting an pt-unsaturated aldehyde with a full acetoacetic acid ester of a saturated polyalcohol containing from 2 to 4 hydroxyl groups in the presence of a basic reacting catalyst.

2. A process for the production of macromolecular compounds which comprises reacting crotonaldehyde with a full acetoacetic acid ester of a saturated polyalcohol containing from 2 to 4 hydroxyl groups in the presence of piperidine.

3. A process as claimed in claim 4 wherein substances are added which are capable of combining with water with the formation of solid indifierent compounds.

4. A process for the production of shaped articles from macromolecular compounds which comprises carrying out in molds the reaction between an 0-,fl-UHS3tUl'3tCd aldehyde and a full aeetoacetic acid ester of a saturated polyhydric alcohol containing from 2 to 4 hydroxyl groups.

5. A process for the production of shaped articles from macromolecular compounds which comprises carrying out in molds the reaction between an l p-unsaturated aldehyde and a full acetoacetic acid ester of a saturated polyhydric alcohol containing from 2 to 4 hydroxyl groups in the presence of a basic reacting catalyst and a substance capable of combining with water selected from the class consisting of calcined gypsum and cement.

6. A resinous condensation product of an mil-unsaturated aldehyde and a full acetoacetic acid ester of a saturated polyalcohol containing from 2 to 4 hydroxyl groups.

7. A resinous condensation product of crotonaldehyde and a full acetoacetic acid ester of a saturated polyalcohol containing from 2 to 4 hydroxyl groups.

References Cited in the file of this patent UNITED STATES PATENTS 1 2,239,441 DAlelio Apr. 22, 1941 2,325,376 DAlelio July 27, 1943 2,326,006 Bruson Aug. 3, 1943 2,426,056 Rust Aug. 19, 1947 2,568,426 Whetstone Sept. 18, 1951 

6. A RESINOUS CONDENSATION PRODUCT OF AN A,B-UNSATURATED ALDEHYDE AND A FULL ACETOACETIC ACID ESTER OF A SATURATED POLYALCOHOL CONTAINING FROM 2 TO 4 HYDROXYL GROUPS. 